webpack.config.js

const path = require('path');
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'js/bundle.js'
  },
  module: {
    rules: [
      {
        test: /\.(sa|sc|c)ss$/,
        use: [
            MiniCssExtractPlugin.loader,
            {
              loader: 'css-loader'
            },
            {
              loader: 'sass-loader',
              options: {
                sourceMap: true
              }
            }
          ]
      }
    ]
  },
  devServer: {
    overlay: true,
    open: true,
    watchContentBase: true
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: './index.html',
      filename: 'index.html',
      hash: true,
    }),
    new MiniCssExtractPlugin({
      filename: 'css/bundle.css'
    }),
  ],
  mode: "development"
};